sources around the world and we go to cairo where three advisers to president mohamed morsi have stepped down as violence has intensified. demonstrators set fire to oofss of the muslim brotherhood. reza is in cairo. >> reporter: president morsi thought he was going to have a cake walk to the nationwide referendum on december 15th on the constitution, he was mistaken. at least three of his advisers resigned tonight as opposition factions continue to put on the pressure against the president and this time, things got ugly and violent in front of the presidential palace. that's where you had supporters of the president and opponents of the president facing off in what started as a staredown and then evolved into an all-out brawl. two sides were clashing by throwing rocks, debris, even molotov cocktails. police came in at one point and broke up some of the clashes. others continued throughout the night. the clock is ticking towards the vote on december 15th. now the question, will the vote take place or will the president back down? erin? >>> our fifth story "out front" beating the odds. whe